Automotive Technology: A Systems Approach (MindTap Course List)
6th Edition
ISBN: 9781133612315
Author: Jack Erjavec, Rob Thompson
Publisher: Cengage Learning
expand_more
expand_more
format_list_bulleted
Videos
Textbook Question
Chapter 55, Problem 5ASRQ
Technician A says that air in the system can cause excessive pressure within the system, restricting the refrigerant’s ability to change its state from gas to liquid within the refrigeration cycle. Technician B says that moisture can cause freeze-up at the cap tube or expansion valve, which restricts refrigerant flow or blocks it completely. Who is correct?
- Technician A only
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
If a hot water reheat coil is installed with a two way modulating valve.
A. The VAV box can only be used for a heating-only application .
B. A variable volume circulating pump must be used.
C. A constant volume circulating pump can be used.
D. The VAV box can only be used for a cooling-only application
8) Which of the following components is NOT within the refrigeration cycle?A: Expansion valveB: CompressorC: EvaporatorD: Extractor
Should the bulb of the thermostatic valve be positioned just below the inlet duct? aspiration?
b) No a) Yes
The hot gas defrost method uses heat from:
c) make-up water
b) electrical resistances
a) hot compressor refrigerant
When the refrigerated space has been allowed to heat up to a temperature higher than the desired one, the system must go through a process outside the normal design conditions to regain its normal operation, this process is called:
c) hot drop a) overheating b) subcooling
Chapter 55 Solutions
Automotive Technology: A Systems Approach (MindTap Course List)
Ch. 55 - What should you do if you suspect that an...Ch. 55 - Explain how dye can be used to find leaks in the...Ch. 55 - What is the purpose of the thermostatic switch in...Ch. 55 - Why should the probe of an electronic leak...Ch. 55 - How will air trapped in the A7C system affect...Ch. 55 - Which of the following statements best defines the...Ch. 55 - Which of the following statements is not true...Ch. 55 - To charge an air-conditioning system while it is...Ch. 55 - All of the following are true statements about...Ch. 55 - A very important part of a performance test on an...
Ch. 55 - While conducting a pressure test on an A/C system,...Ch. 55 - The high-side pressure on a system with a cycling...Ch. 55 - When checking an A/C system, the evaporators inlet...Ch. 55 - All of these are good reasons for replacing an...Ch. 55 - In an AZC system, if the low-side pressure is...Ch. 55 - Technician A says that evacuating (pumping down)...Ch. 55 - Technician A says that some refrigerant leaks can...Ch. 55 - Technician A says that the presence of oil around...Ch. 55 - Technician A says that a faulty accumulator will...Ch. 55 - Technician A says that air in the system can cause...Ch. 55 - Technician A feels up and down the face or along...Ch. 55 - Technician A says that a manifold gauge set can be...Ch. 55 - While discussing an inoperative blend air door:...Ch. 55 - Two technicians were discussing how comparing the...Ch. 55 - While conducting an A/C system performance test:...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.Similar questions
- Technician A says that when the refrigerant is pumped out of the compressor and sent to the condenser, heat in the refrigerant is moved to the outside air by conduction and convection. Technician B says that the refrigerant leaves the bottom of the condenser as a high-pressure, high-temperature liquid. Who is correct? Technician A only Technician B only Both A and B Neither A nor Barrow_forwardTechnician A says that some refrigerant leaks can also be traced to pinholes in the evaporator caused by acid, which forms when water and refrigerant mix. Technician B says that leaks are most often found at the compressor hose connections and at the various fittings and joints in the system. Who is correct? Technician A only Technician B only Both A and B Neither A nor Barrow_forwardTechnician A says that when the A7C system is off, the refrigerant occupies the system as a liquid and its pressure is the same throughout the system. Technician B says that refrigerant is pumped out of the compressor as a high-pressure, high-temperature vapor and is sent to the condenser. Who is correct? Technician A only Technician B only Both A and B Neither A nor Barrow_forward
- Technician A feels up and down the face or along the return bends of the condenser for a temperature change and says that there should be a gradual change from hot to warm from the bottom to the top. Technician B says that a restriction in the condenser will be evident by a sudden change in temperature. Who is correct? Technician A only Technician B only Both A and B Neither A nor Barrow_forwardWhile discussing the operation of air-conditioning systems: Technician A says that in order for the refrigerant to release heat, it must be at a low temperature and pressure. Technician B says that in order for the refrigerant to absorb heat, it must be at a high temperature and pressure. Who is correct? Technician A Technician B Both A and B Neither A nor Barrow_forwardWhat special valve is used in a refrigerated air drier? A. Four-way valve B. Defrost valve C. Three-way valve D. Hot gas bypass valvearrow_forward
- When evacuating a refrigeration system that has solenoid valves, what special procedure must be followed?arrow_forwardWhich of the following is true regarding a reheat water circuit that utilizes two-way modulating valves? A. The water is always circulating and is not prone to coil freeze-up. B. The flow rate is always constant through the reheat water circuit. C. The pump must be able to vary its flow. D. The reheat coil is equipped with a bypass pipe.arrow_forwardWhile discussing an inoperative blend air door: Technician A says that to check the proper functioning of the ductwork, move the temperature control lever to see if any change at the doors occurs. If it does not, shut off the air conditioner and turn on the heater. Move the temperature control arm again to see if any change occurs. If not, check the cable and the flap door connected to the temperature control lever. Technician B says that in some cases you can reach under the dash to reconnect the cable or free a stuck flap. Who is right? Technician A only Technician B only Both A and B Neither A nor Barrow_forward
- When checking an A/C system, the evaporators inlet and outlet tubes feel like they are at the same temperature. Which of these could cause this? A plugged evaporator Correct charge of refrigerant in the system Restricted orifice tube Leaking condenserarrow_forwardWhich of the following statements is not true about orifice tube systems? The suction line must be cool to the touch from the evaporator outlet to the compressor. The liquid line from the condenser outlet to the evaporator inlet should be cool. The evaporator should feel very cold. The accumulator must be cool to the touch.arrow_forwardIn an AZC system, if the low-side pressure is lower than normal, which of the following is the least likely cause? A faulty metering device Poor airflow across the evaporator A restriction in the low side of the system The system being overcharged with refrigerantarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Automotive Technology: A Systems Approach (MindTa...Mechanical EngineeringISBN:9781133612315Author:Jack Erjavec, Rob ThompsonPublisher:Cengage Learning
Refrigeration and Air Conditioning Technology (Mi...Mechanical EngineeringISBN:9781305578296Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill JohnsonPublisher:Cengage Learning
Automotive Technology: A Systems Approach (MindTa...
Mechanical Engineering
ISBN:9781133612315
Author:Jack Erjavec, Rob Thompson
Publisher:Cengage Learning
Refrigeration and Air Conditioning Technology (Mi...
Mechanical Engineering
ISBN:9781305578296
Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Publisher:Cengage Learning
The Refrigeration Cycle Explained - The Four Major Components; Author: HVAC Know It All;https://www.youtube.com/watch?v=zfciSvOZDUY;License: Standard YouTube License, CC-BY